User's Manual

Radical-7 Safety Information, Warnings, and Cautions
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Caution
Do not use In Vivo Adjustment if the monitor displays a Low SpHb SIQ
message.
Caution
If the Low Perfusion message is frequently displayed, find a better perfused
monitoring site. In the interim, assess the patient and, if indicated, verify
oxygenation status through other means.
Caution
Changing the SpHb Cal, the date and time of the system clock, or the trend
period clears the data in the trend memory.
Note: Interfering Substances: Dyes, or any substance containing dyes, that change usual
blood pigmentation may cause erroneous readings.
Note: Inaccurate SpCO and SpMet readings can be caused by:
 Levels of methemoglobin approximately 1.5% or above
 Intravascular dyes such as indocyanine green or methylene blue
 Abnormal hemoglobin levels
 Low arterial perfusion
 Low arterial oxygen saturation levels including altitude induced hypoxemia
 Elevated total bilirubin levels
 Motion artifact
 SpCO readings may not be provided if SpO2 readings are less than 90%
 SpCO readings may not be provided if SpMet readings are greater than 2%
Note: SpO2, SpCO, SpMet, and SpHb are empirically calibrated in healthy adult volunteers
with normal levels of carboxyhemoglobin (COHb) and methemoglobin (MetHb).
Note: The Radical-7 cannot measure elevated levels of COHb or MetHb.